Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control†
AbstractThis paper presents an efficient and high-sensitive micro-sensor designed for wall shear stress measurement. The main technical application targeted is flow separation detection for closed-loop active flow control. The sensor is a temperature-resistance transducer operating on heat transfer. The device is micro-structured with three substrate-free wires presenting a high aspect ratio, and periodic perpendicular micro-bridges ensuring mechanical toughness and thermal insulation. This design achieves a homogeneous temperature distribution along the wires. Welded on a flexible printed circuit, the sensor is wall-mounted on a wind tunnel. The experiments, conducted in both attached and separated flow configurations, demonstrate the sensor sensitivity to wall shear stress up to 2.4 Pa and the ability of the 3-wires based design to perform flow direction sensing for back-flow detection.
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Ghouila-Houri, C.; Gallas, Q.; Garnier, E.; Merlen, A.; Viard, R.; Talbi, A.; Pernod, P. Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control. Proceedings 2017, 1, 376.
Ghouila-Houri C, Gallas Q, Garnier E, Merlen A, Viard R, Talbi A, Pernod P. Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control. Proceedings. 2017; 1(4):376.Chicago/Turabian Style
Ghouila-Houri, Cécile; Gallas, Quentin; Garnier, Eric; Merlen, Alain; Viard, Romain; Talbi, Abdelkrim; Pernod, Philippe. 2017. "Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control." Proceedings 1, no. 4: 376.
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